She’s decided to get to the stage with a jury, attach jeopardy, and then immediately dismiss the case on BS grounds. Because jeopardy was attached (the case was tried, even if in a perfunctory and illegitimate manner), then you can’t charge the defendant with the same crime again. This way, she can essentially discharge the crimes permanently.
That does mean she needs to actually get to the trial stage of things. It also means she can use the trial scheduling to keep tripping up the other trials for his crimes in other jurisdictions as she moves her trial dates around to block progress by other judges. She’s actively trying to undermine the judiciary, the rule of law, and protect an enemy of the republic.